85 lines
2.6 KiB
Python
85 lines
2.6 KiB
Python
"""WESP-политики расчёта на базе GfE 2001 (отличия от zootech Excel — осознанные)."""
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from __future__ import annotations
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from dataclasses import dataclass
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from typing import Literal
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FeedGroup = Literal["rough", "succulent", "concentrate", "other", "unknown"]
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# --- GfE 2001 константы (формулы не меняем) ---
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NEL_Q_COEFF = 0.004
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NEL_Q_REF_PCT = 57.0
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NEL_BASE = 0.6
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GE_CP = 0.0239
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GE_FAT = 0.0398
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GE_FIBER = 0.0201
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GE_NFE = 0.0175
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ME_FAT = 0.0312
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ME_FIBER = 0.0136
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ME_OR_RESIDUE = 0.0147
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ME_CP = 0.00234
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USP_FAT_THRESHOLD_G_PER_KG_DM = 70.0 # 7% СЖ/кг СВ
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# DCAB (Na+K)-(Cl+S), мэкв при минералах в г/кг СВ
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DCAB_NA = 43.5
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DCAB_K = 25.6
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DCAB_CL = 28.2
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DCAB_S = 62.4
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# Дефолты переваримости при пустых коэфф. (Excel legacy, кроме ОВ)
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DEFAULT_CP_DIGEST_PCT = 86.0
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DEFAULT_FAT_DIGEST_PCT = 75.0
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DEFAULT_FIBER_DIGEST_PCT = 86.0
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DEFAULT_NFE_DIGEST_PCT = 94.0
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DEFAULT_INSOLUBLE_PROTEIN_PCT = 15.0
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DEFAULT_PROTEIN_FRACTION_PCT = 18.9
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# WESP: дефолт ВРХ орг. вещ. при пустом поле — по классу корма
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DEFAULT_OMD_ROUGH_PCT = 65.0
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DEFAULT_OMD_SUCCULENT_PCT = 72.0
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DEFAULT_OMD_CONCENTRATE_PCT = 91.0
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@dataclass(frozen=True)
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class DeriveContext:
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feed_group: FeedGroup = "unknown"
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is_main_feed: bool = False
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@classmethod
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def from_cells(cls, *, main_feed_g: float = 0.0, feed_group: FeedGroup = "unknown") -> DeriveContext:
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return cls(
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feed_group=feed_group,
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is_main_feed=main_feed_g > 0,
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)
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@classmethod
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def infer_from_cells(cls, cells: dict[str, float], feed_group: FeedGroup = "unknown") -> DeriveContext:
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main_feed = cells.get("E", 0.0)
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return cls.from_cells(main_feed_g=main_feed, feed_group=feed_group)
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def default_om_digestibility_pct(ctx: DeriveContext | None) -> float:
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"""Дефолт переваримости ОВ (%) при отсутствии ВРХ Орг Вещ."""
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if ctx is None:
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return DEFAULT_OMD_CONCENTRATE_PCT
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if ctx.is_main_feed or ctx.feed_group == "rough":
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return DEFAULT_OMD_ROUGH_PCT
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if ctx.feed_group == "succulent":
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return DEFAULT_OMD_SUCCULENT_PCT
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return DEFAULT_OMD_CONCENTRATE_PCT
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def default_digestibility_coefficients() -> dict[str, float]:
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return {
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"cp": DEFAULT_CP_DIGEST_PCT,
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"fat": DEFAULT_FAT_DIGEST_PCT,
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"fiber": DEFAULT_FIBER_DIGEST_PCT,
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"nfe": DEFAULT_NFE_DIGEST_PCT,
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"insoluble_protein": DEFAULT_INSOLUBLE_PROTEIN_PCT,
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"protein_fraction": DEFAULT_PROTEIN_FRACTION_PCT,
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}
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